The controller has five push buttons, each with a green led.
The first four buttons have images of small and large cup sizes, and a number to represent 1 or 2 shots.
Each time one of the shot buttons is pressed, the machine dispenses a pre-programmed quantity of hot water through the coffee shot. The button on the right is used manually control the flow, for instance to purge the grouphead or during cleaning operations.
Below are the steps to program the dosing on the Gaggia TD.